Solve for a_1 (complex solution)
\left\{\begin{matrix}\\a_{1}=x\text{; }a_{1}=0\text{, }&\text{unconditionally}\\a_{1}\in \mathrm{C}\text{, }&x=a_{2}\end{matrix}\right.
Solve for a_2 (complex solution)
\left\{\begin{matrix}\\a_{2}=x\text{, }&\text{unconditionally}\\a_{2}\in \mathrm{C}\text{, }&a_{1}=x\text{ or }a_{1}=0\end{matrix}\right.
Solve for a_1
\left\{\begin{matrix}\\a_{1}=x\text{; }a_{1}=0\text{, }&\text{unconditionally}\\a_{1}\in \mathrm{R}\text{, }&x=a_{2}\end{matrix}\right.
Solve for a_2
\left\{\begin{matrix}\\a_{2}=x\text{, }&\text{unconditionally}\\a_{2}\in \mathrm{R}\text{, }&a_{1}=x\text{ or }a_{1}=0\end{matrix}\right.
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